Casio watch. Had it for ~20yrs. It died today but I just replaced the battery and it's back again! I had only changed batteries twice: 10 yrs ago and today. Truly BIFL
Casio G-Shock DW5600 vs. GWM5610 // Battle of the Beasts | WATCHSPEC
How to replace G-Shock Casio 5600 Battery - YouTube